JPH0741191U - Anti-vibration pipe fitting with flange - Google Patents

Abstract

(57) [Summary] [Purpose] The flange and the vibration isolator can be joined strongly, the wetted part facing the inside of the pipe is not on the flange, and an O-ring is not required to join the pipe side flange. . [Structure] An anti-vibration pipe fitting with a flange, in which two opposing flanges 12, 12 are joined by a tubular anti-vibration tool 13 made of a rubber material.
The inner opening edge portion 12b of each flange 12 is embedded in the inside of f, and each end surface 13c of the vibration isolator 13 is a joint sealing surface. A through hole 12d may be formed in the inner opening edge portion 12b in which the flange 12 is embedded, and the through hole 12d may be filled with a rubber material forming the thick portion 13f of the vibration isolator 13. Further, the inner opening edge portion 12b in which the flange 12 is embedded may be baked and joined to the thick portion 13f of the vibration isolator 13.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a flanged anti-vibration pipe fitting that isolates vibrations from a vibration source such as a pump.

[0002]

[Prior art]

 Some bathtub systems force hot water into the bathtub with or without air bubbles to provide a pleasant stimulus to the bather. This bathtub system opens a discharge port and a suction port inside the bathtub, connects the discharge port and the suction port with a circulation pipe arranged outside the bathtub, and arranges a circulation pump in the middle of this circulation pipe. Configured. The circulation pipe is joined with a vibration-proof pipe fitting in order to block transmission of the vibration of the circulation pump to the bathtub. In addition to this bathtub system, anti-vibration piping tools may be placed in the middle of the piping to prevent vibrations from being transmitted through the piping.

Generally, a rubber hose is used for the antivibration piping tool. In this anti-vibration piping tool, the ends of the pipes were fitted into the openings at both ends of the hose, and then the hose bands were tightened to join the pipes together. However, this anti-vibration piping tool has a problem in that it cannot be made compact because the entire length is long, and that it is difficult to manage the dimensions at the time of joining because it is a hose band stop.

In order to solve this problem, a flanged anti-vibration pipe fitting shown in FIG. 4 can be considered. This anti-vibration pipe fitting 1 with a flange is formed by joining two opposing flanges 2, 2 with a tubular anti-vibration tool 3 made of a rubber material. Each flange 2 is formed of a stainless steel material in order to obtain the corrosion resistance of the liquid-contacting portion 2b facing the inside of the pipe. The vibration isolator 3 is formed of a rubber material suitable for piping having good water resistance. The flange 2 and the vibration isolator 3 are formed by applying a baking agent to the joint surfaces 2a, 3a and then joining the joint surfaces 2a, 3a by baking. In the flanged anti-vibration pipe fitting 1 configured in this manner, the flanges 2 and 2 are connected to the pipe side flanges 4 and 4 via the O-rings 5 and 5, and they are also joined by the bolts 6 and 6.

[0005]

[Problems to be solved by the device]

 However, the flanged anti-vibration pipe fitting 1 has the following problems. (A) Baking of a stainless steel material and an EPDM rubber material has weak bonding strength. Therefore, when a large external force is applied to the joint between the flanges 2 and 2 and the vibration isolator 3, they may separate and cause a water leakage accident. (B) Since the flange 2 having the liquid contacting portion facing the inside of the pipe needs to be formed of an expensive stainless steel material, the cost increases. (C) Since it is necessary to provide the O-ring storage groove 4a in each pipe side flange 4, the cost increases.

In order to solve the above-mentioned problems, the present invention makes it possible to strongly bond the flange and the vibration isolator, and there is no liquid-contacting part facing the inside of the pipe on the flange, and further the joint on the pipe side flange. The purpose is to provide a flanged anti-vibration pipe fitting that does not require an O-ring.

[0007]

[Means for Solving the Problems]

 The means adopted by the present invention is a flanged antivibration pipe tool in which two opposing flanges are joined by a tubular antivibration device made of a rubber material. The flanged anti-vibration piping device is characterized in that the inner opening edge portion of each of the flanges is embedded, and each end face of the anti-vibration device is a joint sealing surface.

In some cases, a through hole is formed in the inner opening edge portion of the flange where the flange is embedded, and the through hole is filled with a rubber material that forms a thick portion of the vibration isolator. Further, the inside opening edge portion in which the flange is embedded may be baked and joined to the thick portion of the vibration isolator.

[0009]

[Action]

 Since the inner opening edge of each flange is embedded from the outer peripheral surface of the vibration isolator to the inside of the thick part, it will be mechanically joined to the vibration isolator and The bond of is strong. Since the inner opening edge of each flange is buried in the thick portion from the outer peripheral surface of the vibration isolator, there is no portion facing the inside of the pipe. Since the vibration isolator made of rubber material has each end face as a joint sealing surface, it can be watertightly joined without using a sealing material such as O-ring when joining to the other side.

When the through hole formed in the flange is filled with the rubber material forming the vibration isolator, the joint between the flange and the vibration isolator becomes stronger. Further, when the vibration isolator and the flange are baked and joined, the joint strength between the flange and the vibration isolator is further increased.

[0011]

【Example】

 Hereinafter, a flanged anti-vibration piping device according to the present invention (hereinafter referred to as "the anti-vibration piping device of the present invention") will be described based on the embodiments shown in Figs. 1 to 3. FIG. 1 shows the entire anti-vibration piping device of the present invention. (A) is a partially cutaway front view and (B) is a right side view. FIG. 2 is a sectional view taken along the line EE in FIG. FIG. 3 is a sectional view showing a pipe joint state. The improvement of this embodiment is that, as shown in FIGS. 1 and 2, each inner opening edge portion 12b of the flanges 12 and 12 is embedded in the thick portion 13f from the outer peripheral surface 13b of the vibration isolator 13 by Both end surfaces 13c and 13c of the swing 13 are joint sealing surfaces.

The vibration isolator 13 is formed in a tubular shape from an EPDM rubber material suitable for piping having good water resistance and the like. The vibration isolator 13 has annular projections 13d, 13d concentrically formed on each end surface 13c so that each projection 13d has a sealing function similar to that of an O-ring.

The flange 12 is formed of an iron material or a material in which zinc is plated on an iron material into a substantially triangular shape, and female threads 17 are engraved on the burring portions 12c at each corner, and the tip 12b of the inner opening edge portion 12b is formed. -1 is formed by bending. Each of the flanges 12 has a plurality of through holes 12d formed in the inner opening edge 12b as necessary.

The flanges 12 and 12 and the vibration isolator 13 are joined by a structure in which the inner opening edge portion 12b of each flange 12 is embedded from the outer peripheral surface 13b of the vibration isolator 13 into the thick portion 13f. I'm running. When the through-holes 12d, 12d ... Are formed in the inner opening edge 12b of each flange 12, each through-hole 12d is filled with the rubber material forming the thick portion 13f of the vibration isolator 13, The joint between 12 and the vibration isolator 13 is made stronger. The joint strength of each flange 12 may be further increased by bake-bonding the joint surfaces 12a, 13a with the vibration isolator 13 as necessary.

The flanges 12 and 12 are arranged so as to face each other with an appropriate interval S, and are arranged so as to be offset in the circumferential direction so that the female screws 17 and 17 are not positioned coaxially. It has been devised to make the bolt tightening work easier.

As shown in FIG. 3, the vibration isolating pipe fitting 11 of the present invention thus configured is arranged between the pipe side flanges 14 and 14, and the bolts 16, 16 ... Each female screw 17 is tightened. In the antivibration piping device 11 of the present invention, the end face 13c of the antivibration device 13 is crimped to the pipe side flange 14 by the tightening of the bolts 16, 16 ... And completely sealed by the annular ridges 13d, 13d. Only the inner peripheral surface 13e of the vibration isolator 13 of the vibration-isolated pipe fitting 11 of the present invention joined to the pipe comes into contact with the fluid.

[0017]

[Effect of device]

 As described above in detail, the present invention has the following practical effects. Since each flange and the vibration isolator are mechanically strongly joined, even if a large external force is applied to the joint between the flange and the vibration isolator, the flange and the vibration isolator cannot be easily separated. As a result, the present invention can improve the reliability of pipe joining. There is no need to use expensive stainless steel material for each flange because there is no liquid contact part facing the inside of the pipe. As a result, the present invention can reduce the cost.

Since each end surface of the vibration isolator made of a rubber material is used as a joint sealing surface, it can be watertightly joined to the mating flange without using a sealing material such as an O-ring. As a result, the invention of the present application can reduce the labor and cost at the time of joining. When the rubber material forming the vibration isolator is filled in the through hole formed in the flange, the joint between the flange and the vibration isolator becomes stronger, and the reliability of the pipe joint can be further improved. When the joint surfaces of the vibration isolator and the flange are baked and joined together, the joint strength between the flange and the vibration isolator is further increased, and the reliability of the pipe joint can be further improved.

[Brief description of drawings]

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 shows an entire embodiment of a vibration isolating piping device of the present invention, (A) is a partially cutaway front view, and (B) is a right side view.

FIG. 2 is a sectional view taken along the line EE in FIG.

FIG. 3 is a cross-sectional view showing a pipe joining state using the vibration isolating piping device of the present invention.

FIG. 4 is a cross-sectional view showing a pipe joining state using a conventional anti-vibration pipe fitting with a flange.

[Explanation of symbols]

 12 ... Flange 12b ... Inner opening edge 12d ... Through hole 13 ... Antivibration tool 13b ... Outer peripheral surface 13c ... End surface 13f ... Thick portion

Claims (3)

[Scope of utility model registration request] 1. A vibration-isolating pipe fitting with a flange, in which two facing flanges are joined by a tubular vibration-isolating device made of a rubber material. An anti-vibration piping device with a flange, wherein an inner opening edge portion of the flange is embedded, and each end face of the anti-vibration device is a joint sealing surface. 2. The through hole is formed in the inner opening edge portion of the flange where the flange is embedded, and the through hole is filled with a rubber material forming a thick portion of the vibration isolator. Anti-vibration pipe fitting with flange. 3. The flanged anti-vibration plumbing tool according to claim 1, wherein the thickened portion of the anti-vibration tool is baked and joined to the inner opening edge of the flange.